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VERB
打哈欠
If you yawn, you open your mouth very wide and breathe in more air than usual, often when you are tired or when you are not interested in something.
例句
She yawned, and stretched lazily...
她打了個哈欠，伸了個懶腰。
They looked bored and yawned at the speeches.
他們看起來已經(jīng)厭倦了這些演講，直打哈欠。
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N-SING
乏味的事物;枯燥的事物
If you describe something such as a book or a film as a yawn, you think it is very boring
例句
The debate was a mockery. A big yawn...
這場辯論實在可笑。簡直是無聊透頂。
The concert was a predictable yawn.
果不其然，那場音樂會很乏味。
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VERB
（裂隙或缺口）裂開，豁開
A gap or an opening that yawns is large and wide, and often frightening.
例句
The gulf between them yawned wider than ever...
他們之間的隔閡比以往任何時候都要深。
Liddie's doorway yawned blackly open at the end of the hall.
走廊盡頭利迪的門黑洞洞地敞開著。